Apparatus for separation of solid matters from sewage, &amp;c.



PTENTED DBC. 25,1906.

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LPPLICLTIOI FILED IAB- 30. 1900.

APPARATUS. P0P SEPARATION or SOLIDMATTERS'PROMJSPWAGRM l lNvENTgR, CHmsToPH KREMER.

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WITNVESSES" I No. 839,396; MTENTBD 1120.25. 190s.

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APPARATUS Fon SEPARATION or soun MATTERS L RoM swm, u.

APPLIOTIOI FILED ILLSD. 1908.

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PATENTEDTDBG. 25. 190s.

A c. KSPMPR. APPARATUS Pon SEPARATION or SOLID MATTERS PROM SPWASE, So.

LIPPLIQLTIOI FILED IAB-30. 1906.

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CHRssw-OPH KREMER, b5 Atto-maag.

CHRISTOPH KREMER, OF BERLIN, GERMANY,

ASSIGNOR TO GESELLSCHAFT FR ABWSSERKLARUNG, MIT BFSCHRNKTER HAFTUNG, oF BERLIN,

GERMANY.

AP-PARATUS FOR SEPARATIONOF SOLID MATTERS FROM SEWAGE, 0.

Specification of Letters Patent.

Application filed March 30, 1908. Serial No. 308.845.

Patented Dec. 25, 1906.

To all whom t may concern:

' Be it knownvthat I, CHRISTOPH KREMER, a subject of the King of Prussia, German E1nperor, residing at Lindenstrasse 111, Berlin, Germany, have invented new and useful Improvements in'Apparatus for Separation of Solid Mattersfrom Sewage, &c., of which the following is a specification.

This invention relates to apparatus which are especially useful with the apparatus protected by United States Patents Nos. 751,303,

700,056, and 823,688.

The object'of the present invention is to provide an apparatus for assuring separation of solid matters from sewage, the efiiuent of factories, waste waters, &c.

Mynew apparatus is designed to receivethe sludge or sewage and to effect a separation, principally by gravity, of the lighter constituents, such as fatty particles, from the heavier ingredients, such as sand, and to'produce the apparatus in the form. most desired by me I rovide the same with means for removing t e heavier settled ingredients as desired. y

In order that this invention may be better understood, I now proceed to describe the same, reference being had to the accompanying drawings, and to the letters and figures marked thereon. a i

Figure 1 shows va vertical section through apparatus constructed according to my invention. Fig. 2 is a fragmentary view of a form of sera er which may be used with the apparatus ofp Fig. 1. Fig. 3 shows a vertical section through a modified form of apparatus, and Fig.y 4 shows a vertical section on the line B of the apparatus illustrated in Fig. 3.

As is well known, when town sewage or the like is passed through clarifying or settling apparatus-for instance, apparatus such as described or shown in the United States patents heretofore mentioned-the solids separate in the water according to the respective specific gravities of the ingredients, the lighter rising and accumulating until removed by a ladle or otherwise ,and the heavier ingredients, sinking from tlme to time.4 l

The apparatus devised by me and shown in Fig. `1 has a main tank or chamber 1, constructed of any suitable material in any desired manner and opening at Z into another sald rails.

.ing rim 7c to ascend into the in the fluid, must also be removed and .smaller compartment 2, having its floor formed as a collecting-pit or disposed at a lower level than the floor of chamber 1. The form of the chamber 1 and of the compartment 2 may be any desired.

Upon the bottom ,or the loor of the tank orchamber 1 parallel rails 3 3 are secured in such position as to serve as guides for a scraper 4 and keep the same close to the floor. The form of scraperpreferred is illustrated in Fig. 2, which shows a beam 4 disposed at rightangles to the rails 3 3 and hav- Ing openings whereby said beam slides along Entirely along one edge the beam 4 is provided with an upwardly-extending and overhanging portion or hood 5. A rope 10 is connected to the opposite sides of -sald beam, and said rope is arran ed to pass around the pulleys 6, 7, and 9 and to be coiled upon aroll 8, operated by a handle 11. When said handle is operated, the scraper will be traversed along thebottom of tank 1. In Fig. 1 the scraper is shown by heavy linesin an intermediate position, and the extreme advanced and retracted ositions of said scraper are shown by dotte lines.

In the upper art of the tank or compartment 1 I provi e a draining device which is also employed as a preliminary separator and as ameans wherein the lighter ingredients of the sludge are accumulated. I Such device comprises a vessel a, provided with' an internal cylindrical device, such as ring h, in any suitable manner, so that an annular channel i is formed, through which'the sewage passes. Further, the vessel ais provided around its inner periphery and -below the part h with a. projecting rim 7c, which slants upward, so that the waste waters which pass through a. sieve-like cover j into the vessel a and through the annular channel 'i and a sieve e, arranged therein, are forced by the projecton the cylindrical device h, in order to leave there the main quantity of the fat or lighter ingredients contained in such waste waters. An overflow-channel d, having an outflowpipe c, is provided for'carrying off the water. With the apparatus shown in Fig. 1 I avail myself of the preferred process which is carried out near the factory or the like, thus saving cost of great lengthsv of pipes heretodome fg, fitted fore employed and utilizes the decomposi- 4 tion of the fertilizer ingredients in the sewage without the drawbacks (such as generation of objectionable odors) of the earlier processes, and my apparatus also gives the further advantage of being continuous, thus increasing the yield, and is also carried out under water, whereby the odors are decreased.

The sewage or sludge-is poured into the apparatus at the perforated plate j and is delected by the exterior surface of the dome f to the annular channel fi, passing through the perforations of the ring e and being deflected upwardly by the bafiie k. The lighter ingredients-for instance, fats, oils, &c.-will rise and accumulate within the dome, forming a fioating layer, as shown at y, while the heavier in redients will sink and accumulate 'upon the oor of the tank 1. Water passing through the apparatuswill, after separation of vthe lighter and the heavier ingredients therefrom, be discharged through the channel d and pipe c to any suitable point.

For removal of the layer y at any time it is necessary only to lift the plate j and the dome f g. For removal of the heavier settled material it is necessary only to grasp the handle 11 and by rotating the roller 8 cause the rope 10 to pull the scraper 5 (held to the bottom of the tank and guided by the rails 3) toward the channel Z. The overhanging edge of the scraper will prevent the deposited material from riding over the scraper, and such deposited material will be forced through the channel Z into the smaller com-l partment 2, where the heavy ingredients will accumulate, as shown at Z, in the pit of the compartment 2. As shown at the righthand side of Fig. 1, the overhanging edge of the scraper 5 (when in its most advanced portion serves to completely close the channel Z.

T e sludge or sewage removed from tank 1 to compartment 2 begins to ferment and decompose in the water in said compartment, and the fermentation and decomposition take place all the more rapidly, as the sludge or sewage is in accumulated condition and is mixed with a relatively small quantity of water, differing in this particular from previous decomposition apparatus, in which there was only a small percentage of sludge in a great quantity of water. ln consequence o the fermentation and decomposition in the compartment 2 and of the accompanying gas and heat a large proportion of the sludge rises and forms a floating layer X. The residue Z at the bottom of the compartment will consist principally of sand or like material not subject to decomposition.

At any time during the clarifying operations, which proceed Without interruption in the compartment 2, further deposits of sludge may be supplied fromthe tank 1, and as the floating layer X and the settled material may be removed (the latter through the opening 21) at any intervals desired the process will be carried onv without any interruption or stoppage.

A great advantage from the hygienic oint of view resulting from my apparatus is ound in the fact that none of the products of decomposition find their way into the water discharged from the tank 1 and allowed to flow into streams or rivers.

Another form of apparatus according to my invention is shown in Figs. 3 and 4 and illustrates the emplo rment of a conveyer for transferring the slu ge from settling-tank 1 to the compartment 2, wherein decomposition and fermentation take place.

As seen in Fig. 3, I may provide the tank 1 with a floor which slopes to the channel (shown at the left) leadin to an intermediate compartment formed y Walls 12 and 13 and wherein is located a helical conveyer 17, partially housed within a casing 14, rovided with an opening extending along t e entire length of the casing and coinciding with the channel heretofore mentioned. Normally the scraper is drawn to the position indicated by dotted lines in Fi 3, and the o ening in the casing 14 is uno structed. Tie slud e precipitated in the tank 1 will therefore sett e upon the floor of the tank 1 and will move by gravity toward the channel and toward the casing 14.

The scraper 5 may be provided, as shown in Figs. 3 and 4, with a long strip 15, extending throughout the entire length of the scraper and preferably curved, as shown in Fig. 3, to corres ond with the curvature of the casing 14 an to fit within the opening of said casing and completely inclose the conveyer when the scraper is fully advanced (by rotation of roller 8 and ull of rope 10) to force the precipitated sludge into the conveyer-casing.

As shown in Fig. 4, the conveyer 17 is arranged to deliver thesludge into com )artment 2. For this purpose the rod or ax e 20 of the conveyer-screw is driven by bevelgears 19 and by the u right 18, provided with hand-wheel 16. T fie'opening m, Fig. 4, through which the conveyer delivers the sludge, should correspond in diameter to said conveyer.

l What I claim is- 1. An apparatus for separation of matter from sewage, &c., comprising a tank wherein the heavier constituents of the sewage sink and containin a device for separating and retaining the ighter constituents, a second tank having an open connection with the first-named tank, a conveyer located in said open connection, a scraper movable along the Hoor of the first-named tank for transferring sunken Solids to and for closing said open connection, and means for operating said scraper and said conveyer separately.

2. An apparatus for separation of matter from sewage, &c., comprising a tank wherein IOO IIO

-Wherein the heavier constituents of the seW` the heavier constituents of the sewage sink and containing a device for separating and retaining the lighter constituents, a second tank having an open connection with the first-named tank, a conveyer located in said open connection and in a cas" open along one side thereof, a scra er mova le along the floor of the first-named) tank for transferring sunken solids to and for closing the opening in said casing, and means for operating said scraper and said conveyer separately.

3. An apparatus for the separation of matter from Sewage, &c., comprising a tank age sink and containlng a device for separatlng and retaining the lighter constituents,

rails secured upon the oor of said tank, a second tank having an open connection with the first-named tank, a broad scra er having an overhanging upper end and sllfdably engaging the rails aforesaid and movable along the floor of the first-named tank for transferring sunken solids to and for closing said open connection, and means for operating said scraper. In testilnon)T whereof I vhave signed my name to this specification in the presence of two subscribing Witnesses.

CHRISTOPH KREMER. Witnesses: WOLDEMAR HAUPT,

HENRY HAsPER. 

